Central diabetes insipidus happens when damage to a person's hypothalamus or pituitary gland causes disruptions in the normal production, storage, and release of vasopressin. 1  The disruption of vasopressin causes the kidneys to remove too much fluid from the body, leading to an increase in urination.
Foreign national A foreign national is a person who is not a citizen of the host country in which he or she is residing or temporarily sojourning. For example, a foreign national in Canada is someone who is neither a Canadian citizen nor a permanent resident of Canada. However, in the European Union, a foreign national is a third country national, i.e. someone who is not a citizen of any of the member states of the European Union.
Definition of foreign for Students. 1  1 : located outside of a place or country and especially outside of a person's own country a foreign nation. 2  2 : belonging to a place or country other than the one under consideration Do you speak a foreign language? 3  3 : relating to or having to do with other nations foreign trade.